Frequently asked questions

Freshwater Technical equipment

Can sera fluorescent tubes be dimmed, and what do I have to consider?

Hello, the sera fluorescent tubes can indeed be dimmed (e.g. for sunrise or sunset simulation). This requires operation with an electronic ballast. The tubes must be burnt in for 100...

Freshwater Care

Can the carbonate hardness be higher than the total hardness?

Hello, the reason for this difference is as follows:From a "chemica"' viewpoint, the total hardness ist the total amount of bivalent metal ions. In practical aquarium terms, this can...

Freshwater Technical equipment

Can you use magnets for attaching things in an aquarium?

Hello, this is only possible if the magnet itself is entirely enclosed in a waterproof shell (plastic), otherwise there will be considerable corrosion (rusting magnet) and possibly...

Freshwater Food

Catfish do not see their food

Hello, generally, the fish do not need to see their food that well - they can smell it easily and find food even when it is dark. Newly added fish are often still shy and need some...

Freshwater Care Technical equipment

Cleaning pH electrodes

Hello, pH electrodes made of glass (or in case of those made of plastic: all glass parts) are indeed very sensitive, also and especially towards mechanical damage. For cleaning, a...

Freshwater Invertebrates

Combat snails with pufferfish?

Hello, I must urgently advise against using pufferfish as "snail killers". It is of course correct that pufferfish considerably decimate snails and usually eat an aquarium snail...

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